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ModuleId.h

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// $Id: ModuleId.h,v 1.1 2000/12/08 22:31:13 igable Exp $

#ifndef GLAST_MODULEID_H
#define GLAST_MODULEID_H 1
//#include "instrument/Glast.h"
#include <stdlib.h>
#include <iostream>
#include <cmath>

inline static int iabs(int i){return i>0?i:-i;}

static int yNum = 4;

class ModuleId
{
  public:
      ModuleId (unsigned int id = 0);
      ModuleId (unsigned int ix, unsigned int iy);

      // access to the row/column
      int ix () const;
      int iy () const;

      // is this module a neighbor?
      bool neighbor (const ModuleId& n);

      // read/write the id to a strema
      void write (std::ostream& out) const;
      void read (std::istream& in);

      // dereference operator
      operator unsigned int () const { return m_id; }

private:
      unsigned int m_id;
      unsigned int row, col;
};

// inline declarations

inline ModuleId::ModuleId ( unsigned int id ) : m_id (id)
{
    // Determine row & column
    row = (int) floor(double(id) / yNum) + 1;
    col = (id % yNum) + 1;
}

inline ModuleId::ModuleId ( unsigned int ix, unsigned int iy ) : row(ix), col(iy)
{
    // Determine id
    m_id = ((ix-1) * yNum) + (iy - 1);
}

inline int  ModuleId::ix () const
{ 
    return row; 
}

inline int  ModuleId::iy () const
{ 
    return col; 
}

inline bool ModuleId::neighbor (const ModuleId& n)
{
    return iabs(ix()-n.ix())<2 && iabs(iy()-n.iy())<2;
}

inline void ModuleId::write (std::ostream& out) const
{
    out << m_id;
}

inline void ModuleId::read (std::istream& in)
{
    in >> m_id;
    row = (int) floor(double(m_id) / yNum) + 1;
    col = (m_id % yNum) + 1;
}

inline std::ostream& operator<<(std::ostream& out,const ModuleId& m)
{m.write(out); return out;}

inline std::istream& operator>>(std::istream&  in, ModuleId& m)
{m.read(in); return in;}

#endif

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